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With casual online communication on the rise, many overlook proper English punctuation — yet it's the backbone of clear, professional writing. This guide focuses on four essential marks to help you polish your writing.

Commas: The Most Versatile Mark

Commas serve several critical roles. They set off appositives (e.g., "Lila, my neighbor, is a writer") and separate list items (the "Oxford comma" boosts clarity). For example, "a soft, warm blanket" needs a comma to avoid reading the adjectives as a single unit. Another use is separating introductory phrases: "After finishing my essay, I took a walk."

Semicolons: Connecting Related Ideas

Semicolons link closely related independent clauses: "The rain stopped; the sun peeked through clouds." This works when list items already contain commas: "I visited Rome, Italy; Kyoto, Japan; and Vancouver, Canada."

Colons: Introducing and Clarifying

Colons introduce specific lists or key examples. Never use a colon if the list flows naturally (e.g., "The cart had milk, bread and eggs" needs no colon).

Apostrophes serve two main roles: showing possession and forming contractions. For singular nouns, add ‘s (e.g., "the dog's leash"); for plural nouns ending in "s," add s'. One common pitfall is using apostrophes to form plurals (e.g., "apple's" for "apples"). Mixing up "it's" (contraction) and "its" (possessive) is another top mistake.

Consistency matters most in punctuation. Using the same style throughout a piece keeps writing cohesive. With practice, these rules will feel intuitive, making your writing clear and polished.

A. Apostrophes: Quotes & Emphasized words

B. Apostrophes: Key Uses and Mistakes to Avoid

C. They also clarify complex lists with internal commas.

D. However, mastering these basics is simpler than you might think.

E. Commas also separate consecutive adjectives that describe a noun.

F. For example, use them after phrases like "the following" to list items.

G. Semicolons should never be mixed with commas in a single sentence.

Some scientists argued that the rapid spread of AI should not weaken critical thinking. Michael Levitt, professor at Stanford University, noted that while AI systems may provide powerful answers, humans remain responsible for asking meaningful questions. In his view, curiosity, risk-taking and skepticism are essential in both science and technology, since knowledge can only be trusted when supported by evidence.

On the business side, leaders stressed how important it is to use laws and morals to guide interactions between humans and AI. Chey Tae-won, chairman of SK Group, said that AI should not be seen only as a tool, but as a partner that works with humans. He explained that sustainable development depends on a "win-win" approach, in which people, countries and intelligent systems share responsibility and communicate with each other.

Beyond making rules, companies were encouraged to take on greater social responsibility. Businesses should go beyond profit and contribute to a sustainable future through AI training, social support and cooperation between technology and human creativity to solve social problems.

Government representatives also talked about the importance of digital development. They noted that Beijing has developed a strong digital economy supported by many AI companies and skilled workers. Future plans include expanding the "AI Plus" program and using digital technology to improve cultural exchange and international cooperation.

However, participants also warned that AI and big data bring challenges, such as problems related to data use and cultural imbalance. Leaders in education said that the best way to close digital gaps is to accept different cultures and encourage fairness and shared learning. Only by combining technological progress with human values, they concluded, can society achieve shared prosperity in the digital age.

By blending TCM with modern baking, hospital bakeries have become attractive destinations for young consumers who care about health. Many of them believe such bread can provide both daily nourishment (营养) and mild health benefits. Wu Min, a visitor from Sichuan province, said she bought dozens of loaves as gifts after learning about the bakery online, a practice that has become common among young travelers.

This trend is not limited to large cities. In Xishuangbanna, a hospital produces Swiss rolls containing sour rose hips, following the local Dai tradition of adding medicinal plants to food. Similarly, a hospital in Guizhou province has introduced "fish mint bread", combining a local ingredient with baking to satisfy both curiosity and health awareness. According to hospitals, these products aim to make traditional medicine part of everyday life.

Experts point out that young people today face health problems caused by heavy workloads and irregular schedules. While they pay increasing attention to health management, many prefer affordable and convenient solutions. They are more willing to embrace the concept of "food as medicine". A recent report shows that people aged 18 to 35 account for 83.7 percent of health and wellness consumers in China, and social media has played a key role in spreading related trends.

However, specialists also warn of potential risks. Many medicinal breads fail to clearly state the types and amounts of herbal ingredients or provide dietary guidance. Without clear industry standards, consumers may develop unrealistic expectations. Experts stress that such products should be viewed with caution, as improper promotion could damage public trust in traditional Chinese medicine in the long term.

Wang Sihan, an 18-year-old freshman majoring in early childhood education, noticed the booth and stopped to learn more. She decided to join because the program was closely related to her major, and she wanted to put what she learned into practice. As a volunteer, Wang tutors a young girl with language development delays, and the slow progress has taught her to take the work seriously and stay patient. Like many new volunteers, Wang did not realize that she was becoming part of a program with a history of nearly thirty years. The tutoring program has long been one of the university's most important volunteer activities.

According to Yang Yifan, a university official, the program was started by students who hoped to give back to society through knowledge. Over the years, it has worked with local volunteer groups and organizations supporting people with disabilities, which has helped it reach more families in need. Volunteers visit local communities, learn about each child's situation, and then provide one-on-one tutoring. So far, nearly 1,500 students have taken part in the program, offering more than 27,000 hours of service and helping hundreds of children.

The tutoring program not only helps children improve their studies, but also benefits the volunteers themselves. Through tutoring, students become more patient, responsible, and aware of social needs. By sharing knowledge, volunteers and children grow together, showing that small actions can really change lives.

Cheaper gateway

Instead of flying directly from cities like Beijing or Shanghai, travelers now take high-speed trains to nearby second or third-tier cities and catch international flights there. These newly opened routes often cost far less. For example, flights from smaller airports such as Datong or Yuncheng can be less than half the price of those from major hubs. In addition, these airports are usually more efficient, with shorter lines and simpler procedures, making the travel experience more relaxed.

Smart deals

Experts point out that this trend is not just about saving money. Young travelers are making careful choices to improve the value of their trips. By spending less on transportation, they can afford better food, accommodation and activities. Low ticket prices are made possible by cooperation between airlines, travel agencies and local governments, which offer subsidies to reduce operating costs. As a result, affordable international travel has become a regular option rather than a luxury.

Tourism boost

Cheap international flights also help attract foreign visitors. With more direct routes and visa-free policies, smaller cities are becoming new entry points to China. This not only increases tourist numbers but also boosts local hotels, restaurants and employment. In this way, smart travel choices are benefiting both travelers and local economics.

1. 介绍体育课程种类；

2. 推荐一门课程及理由。

注意：1. 词数80左右；2. 可以适当增加细节，以使行文连贯。

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Study tours are taking on the role of extracurricular social education this summer. From historic sites to picturesque natural landscapes, from technology innovation centers to traditional craft workshops, study tours are popping up in various regions across China,  (offer) grown-ups and children unique experiences combining knowledge, techniques, culture and entertainment.

So far, 275 activities  (introduce) to Fujian Province,  intangible cultural heritages are rich, to boost the high-quality development of the local economy. Recently, it has launched  (various) of engaging Intangible Cultural Heritage study tours, ranging from hands-on classes on Shoushan stone carving, tea culture training courses, and herbal study camps  bamboo weaving.

On the other hand, at the Yunnan Provincial Museum in Kunming, students can appreciate the biodiversity and charm of the ancient Dian kingdom.  (it) bronze artifacts cover a wide range of themes, particularly those related to animals. The abundant animal imagery in these bronze pieces  (reflect) people's observation and respect for nature at that time.

Nowadays, study tours extend to Hong Kong, Macao, Taiwan and Chinese communities overseas, becoming  important bridge connecting the  (share) emotions and cultural identity of the Chinese nation, through which students can experience the beauty of the local landscape  the richness of culture.

Perhaps baseball is too4 a thing for father and son to connect over. A ball game might seem, frankly, sort of5 compared with family and career concerns. But that is6 what makes it ideal for forming relationships. We had nothing to7 as we watched them play, except for the8 of enjoying the games together as father and son, which was much greater than it would have been, if either of us had9 without the other. The Cubs were the "place" where we met to enjoy being10.

Lots of sports fans have similar11. Sportswriters find that 42 percent of sports fans were "very12" with their family life, compared with less than a quarter of nonfans.

If your13 with family are a little cold, you might be14 too much usefulness in your activities. Maybe the solution is to develop a taste for baseball, or maybe instead for opera or15.

Show respect. People want to feel respected before they show you the same respect.

Be sure to treat everyone around you well, because it shows a lot about who you are.

Be enthusiastic. . Don't be afraid to show that you are interested in someone. In fact, people often see passion (激情) as a charming sign of strength and inspiration. Showing your enthusiasm by smiling or using friendly humor will make you seem easy-going.

Body language is as important as your words to first impressions. Make sure your posture is good, make strong eye contact (眼神接触) and try to express your interest in others.

Try to avoid the bad days. If something unfortunate happens, you don't have to follow a scheduled meeting on the day. Let them know you don't want unfavorable things to affect them. It'll show your ability to communicate effectively.

A. Make others feel lucky.

B. Instead, you can set another time.

C. Pay attention to your body language.

D. Show interest in the person you meet.

E. Be polite and show manners with "please" and "thank you".

F. Here are some tips on how to make a good first impression.

G. When you go out for dinner, try to follow local dining customs.